CAMBRIDGE UNITED produced a stunning display of commitment, organisation and resilience to earn a FA Cup fourth-round replay with Manchester United.

Robin Van Persie had Manchester United's best opportunity, but failed to hit the target

United were welcomed to a cold, wet and blustery Abbey Stadium - a far cry from the gargantuan modern theatres they've grown accustomed too.

The League Two minnows were dominated in-terms of possession, but managed to limit United to precious few genuine chances.

The home side even had the best opportunity in the first half when Josh Coulson headed over from close range as the visitors, with Wayne Rooney rested, were reduced to half chances.

Louis van Gaal's side, dumped out of the Capital One (League) Cup 4-0 in the second round by third tier Milton Keynes Dons in August, improved after the break with Radamel Falcao going close but they had to settle for an Old Trafford replay.

At times it was difficult to tell which side had won the competition a record 11 times as the Us, who twice won at Wembley last season, refused to be cowed by their more illustrious opponents.

Richard Money's men had Van Gaal squirming on his posterior on the concrete seat in the visiting dugout, particularly when packing the six-yard box at corners.

Cambridge were deservedly level at half-time and indebted to Chris Dunn for staying so entering the final 30 minutes when the goalkeeper saved from Radamel Falcao.

It took United until the 64th minute to score at Yeovil in the third round and, despite occupying Cambridge territory for the majority of the second half, they could not find an opening at Cambridge.

Dunn saved from substitute Robin van Persie and Angel di Maria in stoppage time as the hosts celebrated a memorable result.

Cambridge drew with United 1-1 in their previous meeting at the Abbey Stadium - as part of a 4-1 aggregate League Cup loss in 1991 - and held on once again.

United are still in with a chance of a first FA Cup win since 2004, but must do better in the return.